PD488588FF datasheet(4/79 Pages) ELPIDA

4 / 79 page

Data Sheet

E0251N20 (Ver. 2.0)

µµµµPD488588FF-C80-40

Pin Description

Signal

Input / Output

Type

#pins

Description

SIO0, SIO1

Input / Output CMOS

Note1

Serial input/output. Pins for reading from and writing to the control registers using

a serial access protocol. Also used for power management.

CMD

Input

CMOS

Note1

Command input. Pins used in conjunction with SIO0 and SIO1 for reading from

and writing to the control registers. Also used for power management.

SCK

Input

CMOS

Note1

Serial clock input. Clock source used for reading from and writing to the control

registers.

VDD

Supply voltage for the RDRAM core and interface logic.

VDDa

Supply voltage for the RDRAM analog circuitry.

VCMOS

Supply voltage for CMOS input/output pins.

GND

Ground reference for RDRAM core and interface.

GNDa

Ground reference for RDRAM analog circuitry.

DQA8..DQA0

Input / Output

RSL

Note2

Data byte A. Nine pins which carry a byte of read or write data between the

Channel and the RDRAM.

CFM

Input

RSL

Note2

Clock from master. Interface clock used for receiving RSL signals from the

Channel. Positive polarity.

CFMN

Input

RSL

Note2

Clock from master. Interface clock used for receiving RSL signals from the

Channel. Negative polarity.

VREF

Logic threshold reference voltage for RSL signals.

CTMN

Input

RSL

Note2

Clock to master. Interface clock used for transmitting RSL signals to the Channel.

Negative polarity.

CTM

Input

RSL

Note2

Clock to master. Interface clock used for transmitting RSL signals to the Channel.

Positive polarity.

ROW2..ROW0

Input

RSL

Note2

Row access control. Three pins containing control and address information for

row accesses.

COL4..COL0

Input

RSL

Note2

Column access control. Five pins containing control and address information for

column accesses.

DQB8..DQB0

Input / Output

RSL

Note2

Data byte B. Nine pins which carry a byte of read or write data between the

Channel and the RDRAM.

Total pin count per package

Notes 1. All CMOS signals are high-true ; a high voltage is a logic one and a low voltage is logic zero.

2. All RSL signals are low-true ; a low voltage is a logic one and a high voltage is logic zero.

PD488588FF Datasheet(PDF) 4 Page - Elpida Memory

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